This is the Nth time, for some high value of N, that I've seen this joke presented in a context which implies that it is funny because the protagonist was clever. The protagonist was not clever. "Do you know what I am" in contexts other than grading exams means "do you know what significance I have", not "do you associate my name with my person". You can, of course, laugh at the joke because of the stupidity of the protagonist, or because of incongruity between definitions or whatever, but I sense that this is not how the joke is typically presented.
The funny part is how the threat turned out to have an entirely different meaning.
My stupid fanfic chapter was banned without explanation so I reposted it; somehow it was at +7 when it was deleted and I think silently deleting upvoted posts is a disservice to LessWrong. I requested that a justification be given in the comments if it were to be deleted again, so LessWrong readers could consider whether or not that justification is aligned with what they want from LessWrong. Also I would like to make clear that this fanfic is primarily a medium for explaining some ideas that people on LessWrong often ask me about; that it is also a lighthearted critique of Yudkowskyanism is secondary, and if need be I will change the premise so that the medium doesn't drown out the message. But really, I wouldn't think a lighthearted parody of a lighthearted parody would cause such offense.
The original post has been unbanned and can be found here, so I've edited this post to just be about the banning.